$EFE1/61409: Submit to RS232
Jump from $F26C:
EFE1: 85 9A STA $9A ; Default Output Device (3)
EFE3: AD 94 02 LDA $0294 ; RS232 Pseudo 6551 command Register Image
EFE6: 4A LSR
EFE7: 90 29 BCC $F012 ; No DSR (Data Set Ready) Error
EFE9: A9 02 LDA #$02
EFEB: 2C 01 DD BIT $DD01 ; CIA2: Data Port B (User Port, RS232)
EFEE: 10 1D BPL $F00D ; No DSR (Data Set Ready) Error
EFF0: D0 20 BNE $F012 ; No DSR (Data Set Ready) Error
Jump from $EFF7:
EFF2: AD A1 02 LDA $02A1 ; RS232 Enables
EFF5: 29 02 AND #$02
EFF7: D0 F9 BNE $EFF2
Jump from $EFFC:
EFF9: 2C 01 DD BIT $DD01 ; CIA2: Data Port B (User Port, RS232)
EFFC: 70 FB BVS $EFF9
EFFE: AD 01 DD LDA $DD01 ; CIA2: Data Port B (User Port, RS232)
F001: 09 02 ORA #$02
F003: 8D 01 DD STA $DD01 ; CIA2: Data Port B (User Port, RS232)
Jump from $F00B:
F006: 2C 01 DD BIT $DD01 ; CIA2: Data Port B (User Port, RS232)
F009: 70 07 BVS $F012 ; No DSR (Data Set Ready) Error
F00B: 30 F9 BMI $F006
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